Liquid supplying apparatus

ABSTRACT

A liquid-supplying apparatus including a card reader having a single card insertion opening connected to a plurality of liquidsupplying systems for varieties of liquid. The kinds and quantities of liquid are respectively read from cards put in and out of the card reader in sequence, stored in a memory circuit and used for supply of liquid in the predetermined quantity.

United States Patent Inventors Appl. No.

Filed Patented Assignee Priorities LIQUID SUPPLYING APPARATUS PrimaryExaminer-Raulfe B. Zache Attorney-Holman & Stern ABSTRACT: Aliquid-supplying apparatus including a card reader having a single cardinsertion opening connected to a 6 Chum 5 Bu i Fi plurality ofliquid-supplying systems for varieties of liquid. The U S Cl 3 "2 5kinds and quantities of liquid are respectively read from cards pm inand out of the card reader in sequent stored in a 2 I memory circuit andused for supply of liquid in the predetermined quantity.

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[IIITTEI It I I9 1 32 I men 30 f DISCI rim! 0 SI 6 I AL IUTTII PATENTEBDEBZI lsn 3629 535 SHEET 1 OF 4 INVENTOR S MM #4 no mo am min-a4 r;'Tjmnpn syvm M M ATTORNEYS LIQUID SUPPLYING APPARATUS This inventionrelates to a liquid-supplying apparatus which is controlled bydiscriminating cards, and more particularly to a liquid-supplyingapparatus in which the quantities and the kinds of liquid such as fuelfor supply are automatically controlled and supervised by a single cardreader.

A conventional fuel-supplying apparatus having card readers for readingcards having codes for denoting the quantity of fuel to supply and otherinformation data generally includes card readers respectively for thedelivery systems for supplying different kinds of fuel. Provision of acard reader respectively in each fuel-supplying system however needs agreat cost and space for the card readers and in addition labor ofoperating the card readers individually in separate positions in casesimultaneous or continuous operation of all fuel-supplying systems beingperformed.

A primary object of the present invention is therefore to provide aliquid-supplying apparatus which removes the above disadvantages and isso constructed that a plurality of liquidsupplying systems arecontrolled by a single card reader.

Another object of the invention is to provide a liquid-supplyingapparatus for controlling plural liquid supplying systems to make liquidsupply simultaneously by a single card reader.

Other objects of the invention is to provide a liquid-supplyingapparatus in use of a single card reader cooperating with a plurality ofcards respectively having plural informations therein representingliquid quantity, kind etc. as predetermined for the liquid to besupplied.

Still other object of the invention is to provide a liquid-supplyingapparatus in which a single card reader can successively read the codeson a plurality of cards consecutively put in and out of a single slotprovided on the card reader and the thus read codes are memoried storedin respective liquid-supplying systems corresponding to the codes andserve for controlling operation.

These and other features and objects of the invention will becomeapparent with the following description with reference to theaccompanying drawings, in which:

FIG. 1 is a side view of an embodiment of a fuel-supplying stage in afuel-supplying apparatus according to the present invention;

FIG. 2 is a block diagram of an embodiment of the apparatus according tothe invention;

FIG. 3 is a block diagram of an embodiment showing AND circuits andmemory circuits in the fuel-supplying apparatus of the invention;

FIG. 4 is a circuit diagram of a relay in the circuit for supplying apredetermined quantity of fuel; and

FIG. 5 is a schematic diagram of an embodiment of a circuit forprevention of an erroneous operation of the card reader.

With reference to FIGS. 1 and 2, an embodiment of a fuelsupplyingapparatus for tank lorries is illustrated. In FIG. I, a conduit pipe isconnected to a fuel reservoir (not shown) and extended to a location aspredetermined. In the way of its extending on the ground the pipe to isprovided with a pump ll, a flowmeter l2, and a fixed quantity valve 13.At the end of the pipe 10 is attached a swivel loading arm I4. There isprovided a fuel-supplying stage 17 of a height that an operator caneasily insert the loading arm 14 into a tank R6 of a tank lorry 15. Acard reader 18 having a single card insertion slot [9 is mounted on thestage 17. From a ceiling 20 over the stage 17 is suspended a startswitch 21 at a height free from obstacles during passing of the tanklorry that the operator can efficiently operate the switch 21 which hasa construction capable of preventing an explosion, fire and likeaccidents caused by sparks and excessive currents during its operation.

The flowmeter 12 has a signal emission part 22 which includes a flowquantity signal emitter for emitting electrical pulse signalsproportional to the quantity of flow through the pipe 10, and a fixedquantity signal emitter which operates by delivery of a predeterminedquantity such as l kl. or 2 kl. and the like. The said flow quantitysignal emitter may either be of the microswitch type, contact type inuse of reed switches, or noncontact type as of the photoelectric orhigh-frequency signal emission type. The said fixed quantity signalemitter may be of the construction having for example a notched disk anda microswitch which can emit a fixed quantity signal in each rotation ofthe notched disk. The fixed quantity valve 13 is provided with anelectromagnetic solenoid 23 which is excited causing the valve 13 toopen and is deenergized causing the valve 13 to close.

The first fuel-supplying system as herein provided includes the fuelreservoir, the pump ll, the flowmeter 12 with a signal emission part 22,the fixed quantity valve 13 which is opened or closed by anelectromagnetic solenoid 23, and the loading arm 14. In the vicinity ofthe stage in parallel with the first fuel-supplying system are arrangedsecond and third fuelsupplying systems for supplying the fuel of thekind different from that of the first system. Throughout the systems inthe drawing identical parts are denoted by identical numerals with onedash and two dashes respectively. In the present embodiment are shownthree fuel-supplying systems but the number of systems may be two ormore than four if desired.

FIG. 2 is a block diagram showing an embodiment of the apparatusaccording to the invention. The card reader It! contains a card readerpart 31 therein which consists of reader parts 31a and 31b for readingcodes that a discrimination card 30 put in from its slot 19 may possess.The card 30 is made of, for example, nonmagnetic insulating materialsuch as untransparent synthetic resin and has magnetic metal bitsembedded in an arrangement as predetermined and forming codescorresponding to the quantity of fuel, and other magnetic metal bitsembedded in an arrangement as predetermined and forming similarly codescorresponding to the kind of fuel as predetermined. The card 30 furthermay have other codes such as of the operator number or card number asthe case may require.

The reader part 31 in the card reader 18 comprises the reader part 31aincluding reed switches arranged over the card 30 in positionscorresponding to the magnetic metal bits representing the quantity offuel and permanent magnets arranged bclow said card, and the reader part31b including reed switches arranged over said card in positionscorresponding to the magnetic metal bits representing the kind of fueland permanent magnets arranged below said card. The above described reedswitches are interrupted of magnetic fluxes emitted from magnets, openedor closed when the metal bits of the card are provided betweencorresponding permanent magnets. Thus, according to opening or closingof said each reed switch the reader parts 310 and 3lb will read thecodes of fuel quantity and kind respectively. The reader part 3| is notconfined only to the type as mentioned above but it may be for exampleof a high-frequency oscillation type in which highfrequency magneticfields are modulated or oscillations of oscillatory coils are stopped byshielding of the metal bits of the card.

The code of fuel quantity and that of fuel kind being respectively readby the reader parts 3la and 31b are fed respectively to fuel kinddiscriminating circuits 32, 32' and 32". The fuel quantity codes may berepresented by combination of numerals such as l, 2, 4 and 8 and thefuel kind codes shown by alphabets, for example, A, B and C sinceaccording to the present embodiment the fuel-supplying systems are threein the number. As shown in FIG. 3, signals representing such as l. 2, 4and 8 and A, B and C are fed to AND-circuits 3304311, 33a-33d', and33a"33d" in the discriminating circuits 32. 32' and 32". The outputs ofrespective AND-circuits 330-334 33a-33d', and 33a"33d" are fedrespectively to flip-flop circuits 350-354, 35a35d, and 35a"35 d" ofmemory circuits 34, 34 and 34", the output of said respective flip-flopcircuits is respectively fed to binary-to-decimal conversion circuits36, 36 and 36".

Now referring back to FIG. 2. the flow quantity signals emitted from theflow quantity emitters 22a-22a"of the signal emission parts 22-22"provided at the flowmeters 1242" respectively corresponding to the flowquantity of fuel flowing through the pipes -10" are counted respectivelyby counter circuits 37-37". The results of counting are respectively fedto binary-to-decimal conversion circuits 38-38". The outputs of thebinary-to-decimal code conversion circuits 36-36" and 38-38" are fedrespectively to comparator 39-39", which will emit interlocking signalsor coincidence signals when the outputs of the respective conversioncircuits 36-36" and 38-38" are in coincidence and will actuate relaycircuits 40-40". The relay circuit 40 has a normally closed relay switchX, as shown in FIG. 4, which is opened by a signal from the relaycircuit 40. The switch X, is closed when die reset signal appliedmanually or associated with a printout signal of a printer from aterminal 4l is respectively fed to the memory circuits 34-34" and thecounter circuits 37-37" and these circuits are reset.

In FIG. 4, a relay exciting ooil R which is serially connected to theswitch X, has normally opened relay switches R, and R, Between powersource terminals 420 and 42!: are serially connected the relay switch R,and the electromagnetic solenoid 23 for the fixed quantity valve 13.Also, between the terminals 420 and 42b are provided, in parallel withthe above serial connections, a serial connection of a parallelconnection of the relay switch R, and the start switch 2], a fixedquantity switch 43 of the fixed quantity signal emitter of the signalemission part 12, the switch X,, and the exciting coil R. Other relaycircuits 40', 40" and related circuits are also provided in the samearrangement as the above circuits.

An operation of the apparatus of the described construction will now beillustrated.

Before operation, the relay switch R is opened and the electromagneticsolenoid 23 is in state of nonoperation. The fixed quantity valve 13 isclosed. Similarly, other fixed quantity valves 13' and 13'' are alsoclosed. In case fuel of kind A in 4 kl. and fuel of kind B in 3 kl. areto be supplied in the tank 16 of the tank lorry 15, a driver or anoperator of the lorry will receive at an office two sheets ofidentification cards which include a card 300 having a code of fuel kindA and a code of a quantity 4 kl. and a card 30!) having a code of fuelkind B and a code of a quantity 3 kl. When the fuel supply is to bestarted the driver will insert two cards 30a, 30b consecutively ininsertion slot 19 and pull them out of the card reader 18.

When the card 300 is inserted in the slot 19, the code of fuel quantity4 kl. which has been read by the reader part 310 is applied in theAND-circuits 33c, 33c and 33c" of the fuel kind discriminating circuits32, 32' and 32". The code of the fuel kind A is applied in theAND-circuits 33a-33d of the dis criminating circuit 32. Consequently,that only the AND-circuit 330 is simultaneously applied two inputs toproduce an output and the code of 4 kl. drives the flip-flop circuit 350of the system of the fuel kind A and the code of 4 kl. is memoried inthe circuit 35c after the card 30a has been taken out of the card reader18.

After the card 300 has been taken out of the card reader 18 the card 30bmay be inserted in the slot 19, whereby the code of fuel quantity 3 kl.read by the reader part 3Ia is applied in the AND-circuits (33a, 33b),(33a', 33b), and (33a", 33b") of the discriminating circuits 32, 32',and 32". The code of fuel kind B read by the reader part 31b is appliedin the AND- circuits 33a'-33d of the discriminating circuit 32'.Therefore, only the AND-circuits (33a', 33b) are respectively appliedtwo inputs to produce a respective output. The code of fuel quantity 3kl. drives the flip-flop circuits 35a and 35b of the system of fuel kindB and the output is stored in the circuits 35a and 35b after the card30b has been taken out of the card reader 18.

After the cards 30a and 30b have been read, the driver inserts theloading arm M of the fuel-supplying system of the fuel kind A into ahatch of the tank 16 of the tank lorry l5 and the loading arm 14' of thefuel-supplying system of the fuel kind B into other hatch of the tank16. The driver then will depress switches corresponding to thefuel-supplying systems of the fuel kinds A, B out of the start switch21.

As the start switch 2! corresponding to the fuel kind A is closed by thedepression the exciting coil R is closed to the power source through theclosed switch 21 and the normally closed switches 43, X, and excited toclose the switches R, R, By closing of the switch R, the exciting coil Ris self-held and by closing of the switch R, the electromagneticsolenoid 23 is closed to the power source and excited to open the fixedquantity valve 13. Similarly, by closing of the start switchcorresponding to the fuel kind B the electromagnetic solenoid 23' isexcited to open the fixed quantity valve 13'.

Thus, after opening of the fixed quantity valve 13 the fuel of the kindA in the reservoir is supplied in a chamber of the tank 16 of the tanklorry l5 consecutively through the pipe 10, the pump ll, the fiowmeter12, the fixed quantity valve 13 and the loading arm 14. There are thenemitted flow quantity pulse signals from the flow quantity emitter 22aof the signal emis sion part 22 of the fiowmeter 12 corresponding to thequantity of the fuel supplied in every instant, which signals aredecimally counted by the counter circuit 37 and the conversion circuit38 and thereafter is fed to the comparator 39. When the quantity of fuelflowing through the fiowmeter 12 reaches the amount for example 1 kl. aspreviously set in the fixed quantity signal emitter of the fiowmeter 12,the fixed quantity switch 43 is opened for an instant. By opening of theswitch 43 the exciting coil R is released from self-holding and theelectromagnetic solenoid 23 is deenergized so that the fixed quantityvalve 13 is closed. Usually the tank 16 in the tank lorry 15 ispartitioned in a plural number of chambers each having a capacity of lkl. or 2 kl. According to the em bodiment as the capacity of eachpartitioned chamber is settled to l kl., the fixed quantity of the fixedquantity signal emitter may be set at l kl.

After the fixed quantity valve 13 has been closed by supply of fuel inthe amount of l kl. the loading arm 14 may be put into another hatch ofchamber and the start switch 21 again will be closed. in the same mannerthe fixed quantity valve 13 will open to resume the fuel supply. if thefuel supply of l kl. is ended the valve 13 will close automatically. Thesupply for kind A fuel in 4 kl. in total is finished by successiverepeating of transferring of the loading arm 14, fuel supply, andautomatic valve closing.

By the fuel supply as above described, the flow quantity signals aresent to the comparator 39 which issues an interlocking signal when thevalue of 4 kl. which has been stored in the memory circuit 34 and fed tothe comparator 39 through the conversion circuit 36 coincides with thevalue of 4 kl. supplied to the circuit 39 from the circuit 38. By theinterlocking signal from the circuit 39 the relay circuit 40 is actuatedto open the switch X, and thereby interlocking the fuel-supplyingsystem. After the supply of predetermined quantity of 4 kl., since theswitch X, is opened, it is not probable that the exciting coil R isexcited and the fixed quantity valve 13 opens even though the startswitch 21 might be closed erroneously or intentionally. The switch X, isclosed and returns to its former state when the reset signal from thetenninal 41 is applied in the circuits 34 and 37.

The fuel supply operation of the fuel-supplying system for B kind fuelis quite same as that ofA kind fuel, in which after the fuel supply of 3kl. the relay circuit 40' is actuated to interlock the fixed quantityvalve 13' in a closed condition.

A printer may preferably be used which prints the quantity and kind offuel, numbers of lorry or operator codes, etc. on the cards.

According to the apparatus of the embodiment a plurality offuel-supplying systems can be simultaneously operated after insertion ofa corresponding number of cards in sequence in one card reader tomemorize the codes of fuel kind and fuel quantity. And after supply of apredetermined quantity the fuel supply is automatically stopped.

An embodiment of a card reader erroneous operation preventing circuitwill now be illustrated which may be provided in the card reader 18 withreference to FIG. 5. Usually the conventional card reader has adisadvantage that in the course of insertion or taking out the card intoor out of the card reader the metal bits arranged on the card willpassover the detection parts such as the code-reading element,codereading circuit, etc. in the card reader whereupon said readingparts would make an erroneous reading and decoding and the erred codesare input in the memory circuit. in other cases where one card is put inor out repeatedly, results of decoding at each time of putting in or outare invariably input in the memory circuit thereby causing an erroneousoperation.

The possibility of such error is eliminated in the embodiment of thisinvention. in the embodiment, a card reader part 31 having the slot 19for the insertion of the card 30 has a card insertion confirmation part50 at the innermost part thereof. The confirmation part 50 employs foroperation a microswitch being pushed by the forward end of the card 30or a detection means cooperating with a metal bit provided near at theforward end of the card 30.

A gate circuit Si is provided consisting of AND-circuits 520-52 of thenumber corresponding to that of the reading part in the card reader part31. The reset signal from the terminal 41 is sent to a bistablemultivibrator 53 and the memory circuit 38. The multivibrator 53 isbeing in cutoff state by the reset signal from the terminal 41 and inconductive state by the card insertion signal from the card insertionconfirmation part 50 so as to send the setting signal. A monostablemultivibrator 54 receives the setting signal from the multivibrator 53and sends a pulse wave for a certain short time. An exciting coil 55forming a relay with a normally closed relay contact 56 is excited andopens the contact 56 when the coil 55 receives the pulse from themultivibrator 54. The AND-circuits 520-52 are opened only when thecontact 56 is opened.

In the circuit of the construction as above described, where the card 30is not yet inserted into the card reader 31, the memory circuit 38 isreset by the reset signal from the terminal 4] and the contact 56 isclosed and the gate circuit 51 is closed.

whereupon the card reader part 31 is fully inserted with the card 30there are operated only the reading parts corresponding to the codesthat the card 30 has out of number of reading parts in the card readerpart 31 and decode the codes of said card, the signal of which is thensent to the gate circuit 51. At the same time the card insertionconfirmation part 50 confirms the complete insertion of the card 30 andsends the card insertion signal to the bistable multivibrator 53. Beingin conductance by said signal the multivibrator 53 emits a settingsignal and the subsequent monostable multivibrator 54 receives thesetting signal and emits a pulse wave having a narrow pulse width. Theexciting coil 55 is excited by said pulse and opens the contact 56. Withthe contact 56 being opened, the AND-circuits 52a-52n are opened and thecode of the card 30 is stored in the memory circuit 38 during theopening intervals of the AND circuits. The normally closed contact 56opens only for a relatively short period of time equivalent to the pulsewidth of the pulse emitted by the multivibrator 54 and thereafter itcloses again so that the gate circuit 5! opens only in a short openperiod of the contact 56 to make memory in the memory circuit 38.

Although the card 30 is moved after the memory has been made in thememory circuit 38 and the code number signal decoded by error by thecard reader 3] such as other than the normal code number of the card 30,the gate circuit 51 is closed thereto and such erred code number willnot be stored in the memory circuit 38. Even when the card 30 isinserted in the card reader part 31 the gate circuit 51 will not openunless the card insertion confirmation part 50 operates. Similarly, thememory circuit 38 is not stored the erred code number. Should the card30 be repeatedly put in or out intentionally or carelessly after thecard is inserted, the card insertion confirmation part 50 will operatein the number of times of putting in or out of the card but the bistablemultivibrator 53 will not emit a setting signal unless it receives areset signal from the terminal 41 so that the erred code will not storedin the memory circuit 38.

There may be used a noncontact-type relay circuit utilizing a switchingoperation of the semiconductor in place of the contact relay circuithaving the exciting coil 55 and the con tact 56.

In the above-described system general liquid may be applied to theapparatus in substituting for the above fuel or oil.

What we claim is:

l. A liquid-supplying apparatus comprising a plurality of liquidreservoirs respectively having different sorts of liquid in storage,liquid-supplying conduit pipes arranged respectively for differentliquid-supplying systems extending from respective liquid reservoirs topredetermined positions, means for delivering the liquid respectivelyprovided in the liquid-supplying pipes, fiowmeters provided respectivelyin the liquidsupplying pipes, open-close valves provided respectively inthe liquid-supplying pipes, a single card reader having a single cardinsertion opening, liquid sort discriminating circuits for transmittinga liquid quantity read by the card reader to a circuit systemcorresponding to the liquid sort read by the card reader, memorycircuits provided in each of said systems to memory the liquid quantitytransmitted through the discriminating circuits, and a means for closingthe open-close valves upon coincidence of flow quantity signals from theflowmeters and liquid quantity signals memoried in the memory circuit,said card reader cooperating in sequence with a plurality of cardsincorporating the liquid sort code and the liquid quantity code andhaving reader parts for reading each code of said card.

2. A liquid-supplying apparatus as defined in claim 1 wherein said cardreader has a liquid sort reader part and a liquid quantity reader partcooperating with a card inserted from the single card insertion opening.

3. A liquid-supplying apparatus as defined in claim 1 wherein saidfiowmeter has a fixed quantity signal emission part emitting a fixedquantity signal for each predetennined quantity of liquid and said valveclosing means further has a means for closing said open-close valvetemporarily by a signal from said fixed quantity signal emission part.

4. A liquid-supplying apparatus as defined in claim I wherein said meansfor closing the open-close valves comprises a comparator circuitcomparing the flow quantity signal and the liquid supply signal andproducing an output upon coincidence of said two signals, and means forinterlocking and holding the valve opening means of the open-close valvein nonoperable condition by the output of the comparator circuit, saidholding means being reset by a reset signal to return to its previouscondition.

5. A liquid-supplying apparatus as defined in claim I, wherein aid cardreader includes an erronous-operationprevention circuit which comprisesa card insertion confirmation means to operate when the card is insertedto a predeter mined position in the card reader, a gate circuit providedbetween the reading means of said card reader and the memory circuit,means for actuating only when a signal from the confirmation meansenters in a reset condition and generating a pulse signal of arelatively short time period, and means for opening said gate circuitonly during a period of said pulse signal supplied from said pulsegenerating means, said memory circuit storing the signal supplied fromsaid card reader only during the opening period of said gate circuit.

6. A liquid-supplying apparatus comprising a plurality of liquidreservoirs respectively having different sorts of liquid in storage,liquid-supplying conduit pipes arranged respectively for differentliquid-supplying systems extending from respec tive liquid reservoirs topredetermined positions, means for delivering the liquid respectivelyprovided in the pipes, flowmeters provided respectively in theliquid-supplying pipes, open-close valves respectively provided in theliquid-supplying pipes, a single card reader having a single cardinsertion opening, liquid sort discriminating circuits having ANDCircuits for transmitting a liquid quantity read by the card reader to acircuit system corresponding to the liquid sort read by the card reader,memory circuits having flip-flop circuits in each the comparatorcircuits, said card reader cooperating in sequence with a plurality ofcards respectively incorporating the liquid sort code and the liquidquantity code and having a liquid sort reader part and a liquid quantityreader part cooperating with a card inserted from the single cardinsertion opening.

' i i t I

1. A liquid-supplying apparatus comprising a plurality of liquidreservoirs respectively having different sorts of liquid in storage,liquid-supplying conduit pipes arranged respectively for differentliquid-supplying systems extending from respective liquid reservoirs topredetermined positions, meAns for delivering the liquid respectivelyprovided in the liquidsupplying pipes, flowmeters provided respectivelyin the liquidsupplying pipes, open-close valves provided respectively inthe liquid-supplying pipes, a single card reader having a single cardinsertion opening, liquid sort discriminating circuits for transmittinga liquid quantity read by the card reader to a circuit systemcorresponding to the liquid sort read by the card reader, memorycircuits provided in each of said systems to memory the liquid quantitytransmitted through the discriminating circuits, and a means for closingthe open-close valves upon coincidence of flow quantity signals from theflowmeters and liquid quantity signals memoried in the memory circuit,said card reader cooperating in sequence with a plurality of cardsincorporating the liquid sort code and the liquid quantity code andhaving reader parts for reading each code of said card.
 2. Aliquid-supplying apparatus as defined in claim 1 wherein said cardreader has a liquid sort reader part and a liquid quantity reader partcooperating with a card inserted from the single card insertion opening.3. A liquid-supplying apparatus as defined in claim 1 wherein saidflowmeter has a fixed quantity signal emission part emitting a fixedquantity signal for each predetermined quantity of liquid and said valveclosing means further has a means for closing said open-close valvetemporarily by a signal from said fixed quantity signal emission part.4. A liquid-supplying apparatus as defined in claim 1 wherein said meansfor closing the open-close valves comprises a comparator circuitcomparing the flow quantity signal and the liquid supply signal andproducing an output upon coincidence of said two signals, and means forinterlocking and holding the valve opening means of the open-close valvein nonoperable condition by the output of the comparator circuit, saidholding means being reset by a reset signal to return to its previouscondition.
 5. A liquid-supplying apparatus as defined in claim 1,wherein aid card reader includes an erronous-operation-preventioncircuit which comprises a card insertion confirmation means to operatewhen the card is inserted to a predetermined position in the cardreader, a gate circuit provided between the reading means of said cardreader and the memory circuit, means for actuating only when a signalfrom the confirmation means enters in a reset condition and generating apulse signal of a relatively short time period, and means for openingsaid gate circuit only during a period of said pulse signal suppliedfrom said pulse generating means, said memory circuit storing the signalsupplied from said card reader only during the opening period of saidgate circuit.
 6. A liquid-supplying apparatus comprising a plurality ofliquid reservoirs respectively having different sorts of liquid instorage, liquid-supplying conduit pipes arranged respectively fordifferent liquid-supplying systems extending from respective liquidreservoirs to predetermined positions, means for delivering the liquidrespectively provided in the pipes, flowmeters provided respectively inthe liquid-supplying pipes, open-close valves respectively provided inthe liquid-supplying pipes, a single card reader having a single cardinsertion opening, liquid sort discriminating circuits having ANDCircuits for transmitting a liquid quantity read by the card reader to acircuit system corresponding to the liquid sort read by the card reader,memory circuits having flip-flop circuits in each of said systems tomemory the supply liquid quantity transmitted through the discriminatingcircuits, circuits for counting the flow quantity signals from saidflowmeters, circuits for binary-to-decimal conversion of signals fromthe memory circuits and the counting circuits, comparator circuits forcomparing the signals from said each conversion circuit to produceoutputs upon coincidence of said respective two signals, a means forclosing the open-close valves by outputs of the comparator circuits,said card reader cooperating in sequence with a plurality of cardsrespectively incorporating the liquid sort code and the liquid quantitycode and having a liquid sort reader part and a liquid quantity readerpart cooperating with a card inserted from the single card insertionopening.